Raspberry Pi AXI PMU Driver Under Review For The Mainline Linux Kernel
Curated from Phoronix
This represents a tangible step toward better hardware visibility in embedded Linux systems. While many SREs focus on cloud infrastructure, understanding low-level performance characteristics becomes crucial when dealing with edge devices or constrained environments. The Raspberry Pi's PMU driver integration offers insights into how kernel-level metrics can inform operational decisions for IoT deployments and embedded systems. For practitioners managing fleets of ARM-based devices, this work demonstrates the ongoing evolution of Linux as a platform for both high-performance and resource-constrained scenarios. The key takeaway: monitor your ARM-based embedded systems at the hardware level using these emerging kernel capabilities.
One of the Raspberry Pi device drivers that has remained elusive from the mainline Linux kernel has been for the performance monitoring unit (PMU) for the Broadcom AXI on all Raspberry Pi 1 through Raspberry Pi 5 models.
— Phoronix